Contact for electric welding-machines.



) A. P. EIETZEL. CONTACT FOR ELECTRIC WELDING MAGHINES.

ABPLIGATION FILED AUG. 25, 19 R latentedfiept. 5, 1911.

3 SHEETS-SHEET l.

mfg/W05 (UM /L 3e 2?; 65,

ATTORNEYS A. P. RIE TZBL.

CONTACT FOR ELECTRIC WELDING MACHINES. APPLICATION FILED AUG.25,1908.

1,002,758. Patented Sept.5,1911.

3 SHEETSSHEET 2.

ATTOHNE Y8.

P1 RIETZEL.

CONTACT FOR ELECTRIC WELDING MACHINES.

'APPLIGATIONTIILED AUG. 25, 1908.

1,002,758 7 Patented Sept. 5, 1911.

INVENTOR A TTORNE Y5 a a @0 4 5 7K191 to weld by the use of iiressure devices, Which press "F" w I ll rilllhite ADOLPH l HIETZEL, 0 CHARLESTOVTN, RHODE ISL IKEENTS, TO THOMSGN ELECTRIC WELDING COMP CGRPQRATIGIF OF MAESACHUSETTS.

CCNTAC'I FOR ELECTRIC "WELDING" Specification of letters Patent. 1; Application filed August 25, 1998. Serial No.

To all whom it may concern:

Be it known that I, ,iioonrn F. RIETZEL, a citizen of the United States, and a resident of Charleston n, in the county of l' i ushington and State of llhode Island, have invented certain new and useful Improve to be Welded together,

employed for Welding invention nas y be other objects.

The invention is especially useful for Welding spouts or other similar attachments to the bodies of pots, puns or otherutensils, Where it is desirous to make contact all around the spout or other attuchn'ient. It is also useful Wherever it is desirable to have. a. contact for engaging the Work inovuhlc into and out. of engugenmnt with the work independent; of the movement of the main electrodes or other part of the machine.

My invention'consisiu broadly in provial ing an electric Welding machine with our-- rent-carrying electrodes and contucth for engaging the Work at. the place or places it. is desirable to Weld, the suidcontacts being normally free of the electrodes.

My invention consists further machinefor Welding metal utensils with a the uttnchmeut. lac

in providattachments to contact which will on in providu d i 1 ppl n g2; ojrlc', uhieli are from and moral :5 *h Ellii'l li lj" the cu;

0 oi the ole free of rent; to the outline My llli mounting of movement thereof is obtained.

still further in the the contacts that a universal further in. the dc ofconslzruetion and combinations of My invention consists tells all a round the part to parts hereinafter n'ior scribed and then As above utensils wherein contacts grip which end could the contacts rigid with carrying electrodes. F vention will be shown plied to u inecliii pointed more pullicularly useful for ments, such as, for instance,

all around AND, ASSIGNDR, BY MESNE A ANY, OF LYNN, MAS

MA CHINES Patented Sept. 450,1

2 particularly dcspecified in the claims.

We] di out, in invention is ng ntliucln spouts, to metal it necessary to have the not. be

no for clectricall such attachments, a nmchine ofactor being shown application for tricully Welding utensils, filed N Only such parts the attachment, attained by making the main current- 01 this reason my Mn and described as upy Welding lLlNS ehurand described in my prior patent tor niuchin e for elecnttuclnnents to sheet metal S. N, 34,53,456. of the machine us sary to illustrate my invention and are (lit-- ferent from the machine disclosed in tho ahove-mentionedapplication will herein be shown, the mom and Inoch union-.1

However. this application readily occur to and wherein it: is tuct for engag'iiii ated iudcpenden in the uccolnn illustrates a electric Welding vent-ionin i rcniloited, .l some. 3 of the upper plan View of mg ticul section taken on the line 1 indicates the inoun mil one device 8 is suependcel ll 18' adopted to re any suitable ineunu.

preferably fixed adjusted to clifi'e my invention 1' operation of the eleclrf parts being the "so. s not limited of it], as other persons skilled in uses will he urtdesirable to provide a conh is on 11 of t he'operution ol thc main current-carrying electrodes.

unying drawings, front. elevuti on I of the ma.

VIQ'W front plate of th -21? and 3 and i em a suitable nu eiprocuie up and The lower in one position b rent positions no suitable framework 7 lvin u Figure 1 part. of on D) chine embodv ls preferred form, parts being a is; side elevation of the. is a. plan View looking .on top slide or electrod the contacts parts removed from shown in engaged Fig. 5 is n eii'nilur tuets free from the Work.

c. Fig. l-is a and their operut-- chine and: position with the work.

' showing the con- Fig. 6 is a ver- X, Fig. machine and 2. necurL-rl tluireto.

lower slides P hung the to the file slide :port anal down by slide 4: is ut may he desired.

SACHUSETTS, A

A horn mounted upon the lower slide 4ttorms an anvil. or support upon which the utensil, to which the attachment is to be ject-ing arm 8 and has secured to the under side a replaceable block or electrode 7 located vertically over the block or electrode 6.

The upper and lower slides are secured to the terminals 8, 8 of the flexible secondary of a transformer and receive heating current therefrom as is usual in the art, the guides 2 being suitably insulated from the frame.

Ordinarily, if two plain pieces of 'metal were to be welded together, the parts tobe wcldedwould be placed between the blocks or electrodes 6 and 7, the current turned on and the pressure applied by allowing or forcing the slide 3 to drop.- However, in weldingspouts or similar attachments to utensil bodies, the spout projects a consider able distance from the utensil and is provided with a flange which is welded to the surface of the utensil. In order tov effectually weld the parts, the spout must be gripped all around and welded over the entire flange. It is impractical, if not impossible, to so construct the block"? that it will grip the spout all around its periphery in suclna way that a perfect union will be obtained between the parts. I overcome this difficulty by providing an intermediate contact which willv engage the spout or other attachment on all sides, which contact is normally free from the electrodes or contact blocks 6 and 7 and capable of movement independent of said blocks to bring it, into engagement with the work after which it is engaged by the electrodes to pass heating current to the work. For simplicity, in welding spouts and similar attachments, this intermediate contact is made in two halves suitably cut out to allow for the contour of the spout or other attachmcnt. This pair of contact blocks 9, 10 are each mounted on levers 11, 12 respectively. The levers 11 and 12 are pivotally mounted at one end on a stud 13 and at the other ends a suitable handle is provided for each. A

14 indicates a rock shaft journaled in suitable bearings secured to the back of the plate v 1. The shaft 14 may be loosely mounted in its bearings but is prevented from slipping longitudinally by a pin 15 working -in a groove 16 in the shaft 14 as illustrated more clearly in F ig'. 4.

Mounted freely on tho'shaft 14: is a pivoted arm 17 which projects forward through a suitable opening in the plate 1 and is se cured against longitudinal movement on the shaft 1a by collars 18- secured to the shaft, the said arm 17 being preferably insulated from the shaft and frame by means of an insulating bushing and washers. The pivoted arm 17 carries an adjustable contact-lever bearing 19 upon-which the contact-levers l1 and 12 are mounted by means of. the stud 13, The contactdever bearing 19 has a sliding connection with the pivoted arm 17 and is secured thereto by a fastening bolt 20. The fastening bolt 2C works in an elongated slot 2-1 in the arm .17 to permit the bearing 13) to be adjusted back and forth to properly locate the contact-blocks 9 and 1.0. A tension sprin 22?, secured at one end to a stud 23 projecting laterally from the'frec'end of the arm 17 and at the other end to the front plate 1., serves to keep the contact. blocks and-10 pressed against the-block 7 of the upper electrode when broughtdnto position to be engaged thereby, the upwardmovement of v the contact lever-s, due to the-spring 22, when the upper electrode 7 has been raised being limited by a suitable stop-pin The contact blocks 9, 10 are preferably so mounted on the lovers 11, 12 that they will have a universal movement, that is, they will be free to conform themselves to slight irregularities in the shape of the attachment and secure a good grip or continuous contact on the same, they also beingmounted in such position that they will be in line with the blocks 6 and T secured to the upper and lower slides.

This universal or free movement is preferably attained by securing each block to its lever by means of a. stud "25securely fastened to the block and which passes through a hole in the lever-of a slightly larger diameter than the stud. The inside of the lever is provided with a rise or boss 26 against which the contact presses when'it is caused to grip the work so that the contacts will have asolid bearing against the lovers yet be free to vary their position slightly for irregularities in the work. A pin 27 laterally projecting from the contactdever loosely engages the contact block and prevents the same swinging around due to its loose mounting.

The body of the pot or pan is indicated at 28 while 29 indicates the attachment, here shown in the form of a spout, to be welded thereto. The spout is provided with a flange.

29 by means of which it issccured to the part 28 lay welding it thereto by any suit- The con-.

flange whereby less current is necessary to effect ,t weld.

In th 'operation of the apparatus the pot or pan to which the attachment is "to be welded is placed on the block 6 and the attachment placed in position thereon. The intermediate contact-blocks 9, 10 are then closed upon the attachment by'means of thecontact levers. The upper slide is then brought down until the electrode 7 presses upon the top of the intermediate contactblocks 9, l0 and forces the blocks down upon the flange 29 against the action of the spring 22 after which the current is turned on, it passing from one electrode to the other through the work and the intermediate contacts, thus heating the work to a welding temperature, the weld being completed by tact for engaging the work normally free of the electrodes and means for causing said electrodes to engage said contact.

3. In an electric welding apparatus, the combination of a pair of electrodes, a contact located intermediate of said electrodes and normally free therefrom and means for.

bringing said electrodes into engagement with said contact.

4:. In an electric welding apparatus, the combination of a pair of current carrying electrodes, a contact located between said electrodes and normally free therefrom, means for bringing said contact into engagement with the work by a movement independent of the electrodes, and means for causing said contact to be engaged by said electrodes.

5. In an apparatus for welding attachments to sheet metal utensils, the combina tion of a pairof pressure current-carrying blocks, one fixed, and the other movable toward and away from the first, and an intermediate contact located between said current-carrying blocks and movable into and out of engagement with the work independent of the movement of said currentcarrying blocks.

6. In an apparatus for electric welding,

the combination of a pair of current-carrylng blocks, a contact adapted to engage the Work and normally free fromv said blocks tnd means for bringing said contact into position where it will be engaged by said blocks. a .l

-'7. In an apparatus for electric welding, the combination of a pair of current-carrying blocks, an independentlym'ounted intermediate contact normally free from said blocks and means for bringing said contacts into engagement with the work and in position to be engaged by the said blocks.

8. In an apparatus for welding attachments to sheet metal articles the combination of a pair of currentcarry ing blocks, one fixed and the other movable toward and away from the first and contacts mounted independently of said blocks and adapted to engage the attachment to be welded.

9. In an apparatus for welding attachments to sheet metal articles the combination of a pair of current carrying blocks, A one fixed and the other movable toward and 85 away from the first and a pair of intermediate contacts for engaging the work movable transversely to the movement of said blocks.

10. In an apparatus for welding attachments to sheet metal articles the combination of a pair of current-carrying blocks, one fixed and the other movable toward and away from the first and a contact made in halves and adapted to rip all around the attachment to be welded% 11. In an apparatus for welding attacl ments to sheet metal articles, the combination of a pair of current-carrying blocks, one fixed and the other movable toward and 100 away from the first, pivotally mounted contact-carrying levers mounted independent of said blocks and contacts adapted to engage the work and carried by said levers.

12. In an apparatus for electric welding the combination of current supplying blocks and loosely mounted contacts adapted to engage the work whereby a universaljmovement of said contacts is attained to enable them to automatically conform to the work, 1 i0 13. In an apparatus for electric welding the combination of current supply blocks. contact-carrying levers and contacts adapted to engage the work loosely mounted on said levers.

Signed at Stonington in the county of New London and State of Conn. this Aug. 19th, A. D. 1908.

AD OLPH F. RIETZEL.

lVitnesses:

JOHN A. LENIHAN, C. E. MARTIN. 

